Homework Help: Physics

Posted by Angela on Sunday, October 14, 2012 at 12:40pm.

Starting from rest, a 11.50 kg suitcase slides 3.18 m down a frictionless ramp inclined at 40° from the floor. The suitcase then slides an additional 5.22 m along the floor before coming to a stop.
(a) Determine the suitcase's speed at the bottom of the ramp.
(b) Determine the coefficient of kinetic friction between the suitcase and the floor.
(c) Determine the change in mechanical energy due to friction.

Physics - bobpursley, Sunday, October 14, 2012 at 12:46pm
energy of fall=mgh=bottom KE
mgh=1/2 m v^2
v^2=2g(3.18/sin40

solve for v at bottom. Then

1/2 mv^2=mu*mg*5.22
solve for mu
Physics - Angela, Sunday, October 14, 2012 at 12:57pm
Thank you!!

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